Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0827e191de1047…

MALICIOUS

PDF

82.3 KB Created: 2021-03-03 12:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 64dc96987a6108a7dfb3f4d4864cfda9 SHA-1: 7cb75ea8d3fff3f148cbd32d0fa7083f29d5b997 SHA-256: dc0827e191de10471e71aefd89f5ac45f381f4a5bdc0a1bf3e004c674becdbd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the heuristic firings suggest the document's primary purpose is to redirect users to numerous external sites, potentially for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/123?utm_term=how+many+chapters+in+a+court+of+mist+and+fury PDF link annotation
    • http://tesugujinarijag.mywebcommunity.org/cuales_son_los_medios_de_comunicacion_del_ser_humano.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/fYmibha/sanalefavuxozi.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/ji2pRvj/pinujavubazij.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/gogo_sport_scooter_charger.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/RjighaF/easy_bake_cake_recipes_from_scratch.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/kjhjegj/smash_wario_combos.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/nhchibu/87331495915.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/3gg5bOJ/28730127520.pdfIn PDF document text
    • https://cdn.sqhk.co/rikipago/5Nn97s9/bad_piggies_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/ghjF6N9/54384927423.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/Hjhidjc/wells_fargo_mobile_deposit_login.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/ajdhc3C/bukudipitifadugadax.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/2626855.pdfIn PDF document text
    • https://cdn.sqhk.co/pozazoji/hijerlq/65379741740.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zedilegol/example_strategic_communication_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/criminal_psychology_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/chapter_3_bipolar_junction_transistor.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/are_nutri_ninja_cups_dishwasher_safe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 5516 bytes
SHA-256: ec42934f18840a6d68206d5544df972780a3fbcdd99e15af237cd1ca82a9515c
font_01_sfnt_off0001165e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165E 11608 bytes
SHA-256: c99c6ab1ee15e04e30d7ea17f2de0c498104f1b779ee1c106efb70407d46041b

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